diff --git a/src/backend/access/transam/xlogreader.c b/src/backend/access/transam/xlogreader.c
index a9e926c..e22611f 100644
--- a/src/backend/access/transam/xlogreader.c
+++ b/src/backend/access/transam/xlogreader.c
@@ -124,14 +124,9 @@ XLogReaderFree(XLogReaderState *state)
 {
 	int			block_id;
 
-	for (block_id = 0; block_id <= state->max_block_id; block_id++)
-	{
-		if (state->blocks[block_id].in_use)
-		{
-			if (state->blocks[block_id].data)
-				pfree(state->blocks[block_id].data);
-		}
-	}
+	for (block_id = 0; block_id <= XLR_MAX_BLOCK_ID; block_id++)
+		if (state->blocks[block_id].data)
+			pfree(state->blocks[block_id].data);
 	if (state->main_data)
 		pfree(state->main_data);